Pterygocalyx

Pterygocalyx is a monotypic genus of flowering plants belonging to the family Gentianaceae. The only species is Pterygocalyx volubilis.^[1]

Pterygocalyx
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Gentianales
Family:	Gentianaceae
Genus:	Pterygocalyx Maxim.
Species:	P. volubilis
Binomial name
Pterygocalyx volubilis Maxim.

Its native range is Russian Far East to North Vietnam and Korea.^[1]